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Description
The R5421N139F is a protection IC for over-charge/discharge of rechargeable one-cell Lithium-ion (Li+) excess load current. It also includes a short circuit protector for preventing large external short circuit current. This IC is composed of three voltage detectors, a reference unit, a delay circuit, a short circuit protector, and a logic circuit.
Specifications and features
- Low supply current: Supply current Typ. 3.0µA, Standby current (detecting over-discharge) Typ. 0.3µA (for R5421NxxxC), Typ. 1.0µA (for R5421NxxxF) - High accuracy detector threshold: Over-charge detector (Topt=25°C) ±25mV (Topt=0 to 50°C) ±30 mV, Over-discharge detector ±2.5% - Variety of detector threshold: Over-charge detector threshold 4.0V - 4.4V step of 0.005V, Over-discharge detector threshold 2.0V - 3.0V step of 0.005V - Built-in protection circuit: Excess current protection 0.05V - 0.4V step of 0.005V, Accuracy ±15% - Output delay of over-charge: Time delay at C3=0.01µF and VDD=4.3V, 75ms for R5421N111C - Output delay of over-discharge: VDD=2.4V with built-in capacitor, 10ms for R5421N111C/112C - Small package: SOT-23-6 / 6-pin
Application Scenarios
- Li+ one-cell protector for battery pack - High precision protectors for cell-phones and any other gadgets using on board Li+ one-cell battery
Comparison
Advantages- Low supply current helps in reducing power consumption. - High accuracy detector threshold ensures reliable protection. - Variety of detector threshold allows for flexibility in different applications. - Built-in protection circuit provides additional safety. - Output delay features prevent false triggers.
Disadvantages- The small package may be difficult to work with for some users. - Limited to one-cell Lithium-ion (Li+) batteries.
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Similar parts: 430483 , Click to view
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Datasheet
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Shopping guide
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Popular parts of the same kind
- Datasheet: Download R5421N139F
- Chipdatas Part: CD94-R5421N139F
- Warehouse: China, Hong Kong
- Dispatch: Within 24 hours
- Free Shipping: Yes
- Prority Shipping: Yes, 3-5 days
- Last Updated: 2024/06/22 20:37 +0800
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- Full Refund if you don't receive your order
- Full or Partial Refund , If the item is not as described
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